Which description fits the molecular arrangement and motion of a solid?

tightly packed molecules that vibrate in fixed areas

An experiment was done to determine what makes an object sink. Which of the following is correct?

The mass and volume of an object determine if it will sink or float.

Each beaker contains a sample of 30 milliliters (mL) of water. How do the samples differ?

The water molecules in B move faster than those in A.

How can these two researchers follow similar methods to investigate completely different topics?

They are basing their research on common scientific principles.

Which methodology should be used to investigate the effects of soil on Bermuda grass?

The investigation should be repeated several times for reliability.

Lab reports were prepared for a physics class and a biology class. What item will be in both reports?

the results of an investigation

Which of the following correctly describes the process of water freezing?

The disordered liquid molecules become more ordered as they become ice.

The chart below shoes the reaction times of drivers involved in a study for the effect of sleep deprivation?

the number of hours each motorist was awake

Why is it important for the researcher to keep accurate notes about the research?

Accurate notes will allow other researchers to replicate the results.

Which of the following procedures increases the average kinetic energy of the molecules in a beaker of water?

Heating water from 0°C to 100°C

Which of the following is true about a person's weight on the moon versus his or her weight on Earth?

The Moon has less mass and gravity making one weigh less on the Moon.

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Quiz Bowl - 8th Science

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Questions 16

Answers

1
Which description fits the molecular arrangement and motion of a solid?
tightly packed molecules that do not move
tightly packed molecules that compress over time
loosely packed molecules that move randomly
tightly packed molecules that vibrate in fixed areas
2
An experiment was done to determine what makes an object sink. Which of the following is correct?
The object's shape is the only determining factor.
Light-colored objects tend to float easier than darker-colored objects.
The size of the object determines if it will sink or float.
The mass and volume of an object determine if it will sink or float.
3
Each beaker contains a sample of 30 milliliters (mL) of water. How do the samples differ?
The average kinetic energy of the molecules in A is greater than in B.
The water molecules in B move faster than those in A.
The specific heat of the water in B is greater than in A.
The volume of water in A is greater than B.
4
The angle at which the light bends on each material is measured. What is the independent variable?
the angle
the material
the index of refraction
the strength of the light
5
How can these two researchers follow similar methods to investigate completely different topics?
They are conducting their research in similar labs.
They will report their findings to the same scientific board.
They are using the same tools in their investigations.
They are basing their research on common scientific principles.
6
Which methodology should be used to investigate the effects of soil on Bermuda grass?
The investigation should be repeated several times for reliability.
Keep each plant in separate rooms so that they are not influenced by others
Check the growth of her plants once a month and record the findings.
Provide each plant with enough fertilizer to grow at the same rate.
7
Lab reports were prepared for a physics class and a biology class. What item will be in both reports?
the results of an investigation
the scientific name of an organism
measurements of energy levels
mathematical equations
8
Which of the following correctly describes the process of water freezing?
The disordered liquid molecules become more ordered as they become ice.
The ordered liquid water molecules become more
The ordered liquid water molecules become more ordered as they become ice.
The disordered liquid molecules become more disordered as the become ice.
9
The chart below shoes the reaction times of drivers involved in a study for the effect of sleep deprivation?
the number of hours each motorist was awake
the reaction time of each motorist
the stopping distance of each automobile
the type of vehicle each motorist is driving
10
Why is it important for the researcher to keep accurate notes about the research?
Accurate notes are required by law.
Accurate notes will stop others from conducting the same experiments.
Accurate notes will allow other researchers to replicate the results.
Accurate notes will lead to expected results.
11
What kind of change does a cake undergo as it bakes?
electrical
biological
chemical
physical
12
Four samples of metal, all with the same volume, but different masses. Which of the samples is copper?
D
A
C
B
13
Which of the following procedures increases the average kinetic energy of the molecules in a beaker of water?
Cooling steam at 100°C to ice at 0°C
Changing ice at 0°C to liquid water at 0°C.
Changing liquid water at 100°C to steam at 100°C
Heating water from 0°C to 100°C
14
Consider burning paper and making a pie. Why would these actions be classified as chemical changes?
They create new substances.
They change the state of matter.
They change densities.
They are actually physical changes.
15
Observe the diagram below. Which container of water has molecules with the greatest average kinetic energy?
D
B
A
C
16
Which of the following is true about a person's weight on the moon versus his or her weight on Earth?
The Moon orbits the Earth at great speed, making one feel lighter.
The Moon is denser, therefore making one's weight higher than on Earth.
One's mass and weight would be the same on the Moon and Earth.
The Moon has less mass and gravity making one weigh less on the Moon.

Quiz Bowl - 8th Science Flashcards | StudBud